New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/46077#issuecomment-1722249655

Comment:
I bite the bullet and moved the `PYO3_CROSS_...` settings to the rust build-helper.

In #46086 I refactor the other pkgs using `PYO3_CROSS_...`. Both PRs share the first commit.